It seems the kernel driver does not update using the correct order.
Here is what ITE sent me (including the two attachments):
1. If you wanted WDT to stop, you will need to set ¡§index 74(HWB)¡¨ and
¡§index 73h(LSB)¡¨ to 00h
2. If you wanted WDT to restart. You will need to first set ¡§index
74h(HWB)¡¨ values then set ¡§index 73h(LSB)¡¨afterwards.
Example
writeport ( 0x72 , 0xD0)
writeport ( 0x74 , 0x00)
writeport ( 0x73 , 0x0F)
/ / ¡K
1. WDT to stop
writeport ( 0x74 , 0x00)
writeport ( 0x73 , 0x00)
2. WDT to restart
writeport ( 0x74 , 0x00)
writeport ( 0x73 , 0x0F)
Watch Dog Timer Spec
IT8720 LDN 07 about WDT
Register Detail Spec
** Attachment added: "image001.jpg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/932381/+attachment/2740027/+files/image001.jpg
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https://bugs.launchpad.net/bugs/932381
Title:
IT87 watchdog timer driver not working
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